Stay away from the major clubs that have all the lights and dance bullshit. If the club has hustlers on the street, don't go.
I went to a few places (sorry no names) that allow you to walk in, have a beer and decided what girl you want. I'm pretty sure I found those just by using Google maps..
I paid 50-75 Euros for ST, they have beautiful bedrooms so I never left with a girl.
And......I was always happy, the girls do a great job compared to the shit you get in bangkok.